| 摘要 |
An opalescent glass-ceramic product, especially for use as a dental material or as an additive to or component of dental material, including SiO<SUB>2</SUB>, Al<SUB>2</SUB>O<SUB>3</SUB>, P<SUB>2</SUB>O<SUB>5</SUB>, Na<SUB>2</SUB>O, K<SUB>2</SUB>O, CaO and Me(IV))O<SUB>2</SUB>. In order to obtain improved opalescence with improved transparency, in addition to fluorescence, thermal expansion and a combustion temperature adapted to other materials, the opalescent ceramic product is completely or substantially devoid of ZrO<SUB>2 </SUB>and TiO<SUB>2</SUB>, such that the Me(II)O content in the glass ceramic is less than approximately 4 wt % and the Me(IV)O<SUB>2 </SUB>content amounts to approximately 0.5-3 wt %. The invention also relates to a method for the production of the opalescent glass-ceramic product. |
